Regulating device for door checks and closers.



v P. B. NORDQVIST. RBGULATING DEVICE PoR DooR CHECKS AND GLOSERS.

Y APPLICATION FILED MAY 3, 1910.

1,062,297. Patent-,ea May 20,1913.

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P. E. NORDQVIST. DBCULATING DEVICE PCR Doon CHECKS AND C'LosBRs.

APPLICATION FILED MAY 3, 1910. 1 ,062,297. Patented May 20, 1913.

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COLUMBIA PLANoaRAPl-x Co., WASHINGTDN. D. c.

TED STATES PATENT FFTCE.

PER ERIK NORDQVIST, OF CHICAGO, ILLINOIS, ASSIGNOR TO CONCEALED DOORCHECK COMPANY, OF SANTA BARBARA, CALIFORNIA.

REGULATING DEVICE FOR DOOR CHECKS AND CLOSERS.

Specification of Letters Patent.

Patented May 2o, 1ers.

To all whom t may concern.'

Be it known that I, PER ERIK NonDQvisr, a subject of the King of Sweden,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Regulating Devices forDoor Checks and Closers, of which the following is a full, clear,concise, and exact description, reference being had to the accompanyingdrawings, forming a part of this specification.

My invention relates to door checks, and has for its object theprovision of improved means, whereby the door check is associated withmeans which permit a door to be locked in any given open position byacting upon the door check mechanism in such manner that the returningmechanism of said door check is prevented from closing the door.

In the preferred form of the invention herein shown, I employ pushbuttons, which are mounted on the inner edge of the door in such mannerthat whenever the door is in open position, pressing one of the buttonswill hold the door in that position, and

pressingthe other button willrelease the,

door from this position and allow the door check to close it.

I will describe my invention more in detail by reference to theaccompanying drawings, illustrating the preferred embodiment thereof, inwhich- Figure 1 illustrates the left-hand portion of the door checkshown in section; Fig. 2', the right half thereof shown in section; Fig.3, a detail rear View of the locking mechanism; Fig. 4, a top view ofthe check and its association with the hinge; and Fig. 5, a sectionalview through the door check on line 5-5 of Fig. 2.

My improved door check consists of sets of draw springs 1, 2, whichimpinge against an abutment 3, and surround two' stationary tubes 4 and5. The opposite ends of the springs press against ears 6 and 7 providedupon a cylinder 8, which cylinder has a head 9. The head 9 has a chamber10, which connects by means of a duct 11 with the interior of thecylinder 8. The head 9 is screwed into the cylinder 8 in such mannerthat when the hea-d is removed the cylinder can be properly bored fromits left hand extremity, if so desired. The chamber 10 has a ball valve12, seated preferably upon a metal seat 13, below which I provide awasher of fiber or similar material, all of which parts forming thevalve seat are then held in place by means of the screw-threaded nut 15.From this, it will be apparent that theV ball valve 12 permits fluid toenter the cylinder at its left hand extremity, but prevents its returnthrough that same opening. A projection 16 prevents the ball fromclosing the aperture of the duct 11. The cylinder is connected, by meansof the bar 17, with a link 18, which link, by means of a bolt 20, ispivotally fastened to the hinge 21. Suitable packing prevents ,egress offluid hroigh the opening, and accommodates the The entire door check isinclosed by a shell 23, which engages a portion of the abutment 3 at oneend, and is closed by a cap 24 at the other end, thus to maintain fluidin said door check proper. Vhen the door is opened, the link 18 and arm17 draw the cylinder 8 to the left, against the action of the drawsprings 1 and 2, at they same time permitting liquid or other suitablefluids, which fills the door check up to about the lower edge of thetube 25, to enter the cylinder through the valve 12. The precipitatereturn of the door, under the actuation of the springs 1 and 2, is thenprevented by a piston 26, fastened 'uponV the piston rod 27,' whichpiston rod is loosely mounted in an open head or a bridge 28. A spring29 acting against the piston and the head serves to hold the piston inits left-hand po sition. The piston has a longitudinal bore 30, throughwhich the liquid in the cylinder can pass througha nozzle 31, theopening of which nozzle is closed by a valve 32, through the agency ofan adjustable valve actuating rod 33, which holds the valve 32 slightlyaway from its seat. The action of the draw springs tending to push thecylinder toward the Vright forces the liquid of the cylinder past thevalve 32 in a small quantity, thereby const-itutingfa fluid cushioningmeans for permitting the door to close slowly. The valve 32is heldin itsplace by a screw 34 fastened in the head 28.. The rod 33 extends througha suitable packing 34 in the abutment 3, and terminates in a threadedend screwed in a sleeve 33a slidably mounted in said abutment; saidsleeve being actuatingly engaged by the vertical, arm 42a' of abell-crank lever 42. The threaded end of the rod 33 can be readilyadjusted in the sleeve 33a to shift the rod 33 for adjusting theposition of the valve 32; thus constituting a simple and convenientdevice which can be adjusted to permit either quick or slow closing ofthe door. A spring 36 holds the valve 32 against its seat, which springis held in place by a pin 37. The rod 33 has a hinged extremity 33,which serves the purpose of permitting the door to close more slowly asit approaches its closed position. This is due to a projection 39 uponthe ear 6, which projection, as the cylinder moves toward the left,elevates the jointed rod 33 and extension 38, so as to press the valve32 farther away from its seat. As the door approaches normal position,it will be seen that the projection 39 permits the lowering of the hingeport-ion of the rod 33, thereby reducing its effective length, andgradually bringing the valve 32 against its seat to make the door closemore slowly. The rod 33 and its extremity 38 thus serve a dual purpose,making a permanent adjustment of the action of the valve 32, and at thesame time a variable adjustment in the course of each operation. Vhenthe door is nearly closed, it is well to provide means for the rapidescape of the liquid, in order to give a sudden jerk to the door to besure that it closes eiiectually, and for this reason, I provide aby-pass 40, which serves the purpose above outlined in permitting theliquid from the operative cylinder chamber 41 to pass to the other sideof the piston 26.

In order to set the door, or allow it to remain stationary in any givenopen posit-ion, I provide a valve-controlling lever 42, which is underthe control of an arm 43, which valve-controlling arm 43 is adapted tobe engaged by a second arm 44, by being hooked thereon, and which arm 44has a turn buckle, so that its length may beadjusted. Said arm 44 isfastened to a bar 46, which bar 46 is pivotally secured to a rocker arm47. This rocker arm has t-wo push buttons 4S and 49. 'The vertical arm42a of the bell-crank lever 42 may be pivotally 4connected to the sleeve33a, or actuatingly connected therewith in any well known manner. Whenit is in the position shown, the rocker arm has pulled the arm 43 in adownwardly direction, in which position it allows the bar 33 to remainin its normal position. When, however, the push button 49 is pushed intothe door, the arm 43 is raised, which rotates the lever 42, and

Vpulls the arm 33 outwardly to close the valve 32, and thus prevent thefluid from leaving the cylinder, whereby the draw springs cannot act andthe door remains in a given position. When again the actuating plunger48 restores the bar 33 to its normal valve-actuating position, the doorwill close. Any suitable means may be provided for holding the rockerarm 47 in either of its limiting positions, such as a coiled spring 50having one end secured to said rocker arm and its other end pivoted to asupport 52 for permit-ting swing of the adjacent end of the rocker armto positions on opposite sides of said pivot point.

When the door is opened 900, this locking device is operative, butshould the door be moved more than 90", it will be seen that the link 18occupies a position where, if the door were locked and some unauthorizedperson attempted to force the door shut, a stress would be exertedagainst the rod 17, almost at right angles to this rod, which would tendto break it. For this purpose, means are 'provided to prevent the doorfrom being locked in a position where it would stand open more than 900,and this means consists of a port 53, which registers under the lefthand side of the piston 26 when the door is open 90. Thus, if the dooris opened 180, the interior of the op* erative chamber of the cylinder41 communicates through the port 53 with the exterior, and the drawsprings can return the door to its normal 90o position when the valve 32is open or shut. When the door is locked in a position in which it isopen 90O or less, and some unauthorized person *forces the door shut, orattempts to do so, none of the operative parts will break because of thespring 29, which will give under compression, and t-he extra pressure offorcing the door shut will result in forcing some of the liquid past thevalve 32, the spring 29 taking up the initial thrust.

It will of course be understood that all of the parts herein described,excepting the hinge 21, the plate 54, and the casting 55, are mountedupon the door, said parts which are not mounted upon the door beingmounted upon the door casing.

Cross reference is made to co-pending applications Serial Nos. 559203,559209, 559210, 559211, 559213 and .559214 filed by applicant May 3,1910, which show general features of construction, shown but not claimedin this application, which is limited to my improved locking device.

Having thus described my invention,`

2. A regulating device for door check and closer comprising afluidcushioning means, a valve for cont-rolling the flow of fluid, and meansfor adjusting said valve, in combination with a double push-buttondevice having means for controlling said adjusting meansrto arrest theaction of said door check to maintain said door in any desired openposition, said device including a rocker arm, and a plurality of pushbuttons for actuating said arm.

3. A regulating device for door check and closer comprising a fluidcushioning means, a valve for controlling the iioW of fluid, and meansfor adjusting said valve, in combination With a push-button devicehaving means for controlling said adjusting means to arrest the actionof said door check to maintain said door in any desired open position,said device including a rocker arm, a plurality of push buttons foractuating said arm, and a spring adapted to hold said arm in either ofits tWo limiting positions.

4. A regulating device for door check and closer comprising a fluidcushioning means, a Valve for controlling the flow of uid, and means foradjusting said valve, in combinaa tion With a push-button device havingmeans for controlling said adjusting means to arrest the action of saiddoor check to maintain said door in any desired open position, saiddevice including 'a rocker arm, a plurality oit' push butto-ns foractuating said arm, and a spring adapted to hold said arm in either ofits two limiting positions, a valve controlling arm, and a linkconnecting said controlling arm and rocker arm.

In Witness whereof, I hereunto subscribe my name this 9th day of MarchA. D., 1910.

PER ERIK NORDQVIST.

Witnesses:

HAZEL JONES, A. LYDA JONES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

